admin_recipe.rb

# app/admin/recipe.rb
index do
  #...
  column "Peso1/Peso2" do |f|
    div status_tag "#{f.peso} kg." if f.peso
    setpoint_lines=[f.sum_setpoints]
    setpoint_lines<< ((setpoint_lines[0]!=f.peso_batch)? "error" : "ok")
    title_error="Error" if setpoint_lines[1]=="error"
    div status_tag "#{setpoint_lines[0]} kg.", setpoint_lines[1], title: title_error || "" unless setpoint_lines[0].blank?
  end
  
  column :tiempo_mezclado do |f|
    "#{f.tiempo_mezclado/60} min." if f.tiempo_mezclado.present?
  end
  #...
end

line.rb

# app/models/recipe.rb
class Line < ApplicationRecord
  #...
  form do |f|
    f.inputs "Details" do
      f.input :recipe, :collection=> Recipe.collection_for_order_outs(f.try(:object).try(:recipe_id))
    end
    f.actions
  end
  #...
end

recipe_fail.rb

# app/models/recipe.rb
# fail!
class Recipe < ApplicationRecord
  has_many :lines, -> { where(:is_expedition => true, :is_internal=>[false, '0', nil]) }
  #...
  def self.collection_for_order_outs recipe_id=nil
    if !recipe_id.blank?
      selected_recipe=Recipe.unscoped.where(id:recipe_id).try(:first)
    end
    recipe_collections=Recipe.unscoped.select("distinct on (code_number) code_number, nombre, id, top_code").to_a
    recipe_collections<<selected_recipe unless selected_recipe.blank?
    recipe_collections.sort_by {|e| e[:nombre]}.map{|e| [e.to_order_out_string, e.try(:id)] }
  end
  #...
end

recipe_ok.rb

# app/models/recipe.rb
# OK
class Recipe < ApplicationRecord
  #...
  def self.collection_for_order_outs recipe_id=nil
    if recipe_id.present?
      selected_recipe=Recipe.unscoped.where(id:recipe_id).try(:first)
    end
    recipe_collections=Recipe.unscoped.with_slot_plc.uniq{|x| x.code_number}.to_a
    recipe_collections<<selected_recipe unless selected_recipe.blank?
    recipe_collections.sort_by {|e| e[:nombre]}.collect{|e| [e.to_order_out_string, e.try(:id)] }
  end
  #...
end